shipped & open

Projects

A selection of things I've designed, built, and occasionally broken in production. Each one taught me something.

Nexus Ledger preview★ featured
2026

Nexus Ledger

A high-throughput distributed payment gateway. Engineered for strict transactional consistency, utilizing distributed locks and idempotency keys to process concurrent API calls without race conditions or double-charging.

JavaSpring BootRedisKafkaPostgreSQL
SourceLive
GraphNet Backend preview★ featured
2026

GraphNet Backend

A distributed professional network architecture. Trades relational bottlenecks for a graph database model, enabling lightning-fast n-degree connection traversals and low-latency feed generation via fan-out caching.

JavaSpring BootNeo4jRedis
SourceLive
OmniDev Engine preview
2026

OmniDev Engine

The infrastructure layer for a real-time collaborative coding platform. Handles live code synchronization via WebSockets and manages isolated, sandboxed execution environments for running untrusted code safely.

JavaSpring BootDockerWebSockets
SourceLive
StayHub Core preview
2026

StayHub Core

Complete inventory and booking engine for a lodging marketplace. Implements complex state machines for booking lifecycles and pessimistic database locking to prevent simultaneous reservation conflicts.

JavaSpring BootHibernateMySQL
SourceLive